:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --signal-color: #e63946;
            --noise-color: #ff9e00;
            --si-color: #2a9d8f;
            --em-color: #7209b7;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
        }
        .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden;  color: var(--text-color);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--text-color);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        .critical {
            color: var(--signal-color);
            font-weight: 700;
        }
        .warning {
            color: var(--noise-color);
            font-weight: 600;
        }
        .good {
            color: var(--si-color);
            font-weight: 600;
        }
        .visualization-container {
            position: relative;
            width: 100%;
            margin: 2rem 0;
            background-color: #f8f9fa;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        #interconnectDiagram {
            width: 100%;
            height: 300px;
            display: block;
        }
        .nav-tabs .nav-tabs .param-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .param-table th, .param-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .param-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        .param-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .warning-box {
            background-color: rgba(255, 158, 0, 0.05);
            border-left: 3px solid var(--noise-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        .critical-box {
            background-color: rgba(230, 57, 70, 0.05);
            border-left: 3px solid var(--signal-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        @media (max-width: 768px) {
            }
        .calculation-step {
            margin-bottom: 1.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px dashed var(--border-color);
        }
        .matrix-container {
            display: flex;
            justify-content: center;
            margin: 1.5rem 0;
            overflow-x: auto;
        }
        .matrix {
            border-collapse: collapse;
            min-width: 300px;
        }
        .matrix-cell {
            width: 40px;
            height: 40px;
            border: 1px solid #ddd;
            text-align: center;
            vertical-align: middle;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .matrix-header {
            background-color: rgba(44, 125, 160, 0.1);
            font-weight: 600;
            padding: 0.5rem;
        }
        .matrix-diagonal {
            background-color: rgba(42, 157, 143, 0.1);
        }
        .matrix-coupling {
            background-color: rgba(230, 57, 70, 0.1);
        }
        .loading-spinner {
            display: none;
            text-align: center;
            padding: 2rem;
        }
        .spinner-border {
            width: 3rem;
            height: 3rem;
        }
        .export-btn {
            margin-top: 1rem;
        }
        .tooltip-inner {
            max-width: 300px;
            padding: 0.5rem 1rem;
            text-align: left;
        }
        .is-invalid {
            border-color: var(--signal-color) !important;
        }
        .invalid-feedback {
            color: var(--signal-color);
            font-size: 0.875rem;
            margin-top: 0.25rem;
        }